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Finding the Fourth Proportional to 400,660, 552,929.04 and 221,812

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Solution

The fourth proportional to 400,660, 552,929.04 and 221,812 is: 306,110.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,660 : 552,929.04 = 221,812 : x
  2. Step 2: Convert to fraction form
    400,660/552,929.04 = 221,812/x
  3. Step 3: Cross multiply
    400,660x = 552,929.04 × 221,812
  4. Step 4: Simplify right side
    400,660x = 122,646,296,220.48
  5. Step 5: Solve for x
    x = 122,646,296,220.48/400,660
  6. Step 6: Final answer
    x = 306,110.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.